Underground, a huge underground city with a depth of more than 1,200 meters will also be built.

The "castle in the sky" has a space several times that of the earth's surface, thus forming a three-dimensional city with an altitude span of more than plus or minus 1,500 meters.

Between the tower city and the tower city, the overhead bridge will be connected with the aerial ropeway layer by layer, and at the same time, all the tower city will be connected in series with the air rail system to form a complete urban system.

In this way, if the building space spanning 3,000 meters above sea level is calculated as a floor of five meters.

It is enough to fold and compress the original 3 million square kilometers of living space by 600 times, that is, the flat area of 5,000 square kilometers.

Of course, because it is not worth much in the Great Wasteland, there is no need to make a pigeon cage so pettily, so it doesn't matter if it is magnified ten times.

That is, 50,000 square kilometers, which is equivalent to a circular area with a diameter of more than 250 kilometers and a circumference of nearly 800 kilometers.

It is only three times larger than the area of the imperial capital of later generations, but the population density is 1,400 times higher than that of the imperial capital of later generations.

It is thanks to the fact that the environment of the terracotta plain is vast and flat enough to allow Bai Yuqi to toss so casually, and at the same time, it is also due to the fact that the various arcane black families he has mastered are rich enough.

Otherwise, just the interior of such a huge building, how to get light, water supply, ventilation and other problems can drive him crazy.

Can now?

In terms of lighting, a miniature energy storage pearl as the core of the [Brightness] rune array can solve everything, energy saving and environmental protection do not consume electricity, only the automatic energy storage of the energy storage pearl is enough to meet the arcane energy consumption of the [Brightness] rune array.

In terms of water supply, just install an [Endless Water Source] at the top of the building.

Ventilation is even simpler, and it is enough to arrange a [Wind Making] rune circle in the central ventilation room of the building, and it can also supply warm and cold air to the building as needed.

In fact, the demand for living space of the indigenous people of the Great Wilderness is much lower than that of later generations, especially those of the common class.

Before Bai Yuqi abolished the class system, the Shu people felt very satisfied that they could have a shelter from the wind and rain enough to lie down.

And the people are like livestock, usually locked in animal pens, cattle pens and even cellars by their owners in groups, as for the bed or something, there is no need to count on it, it is good to be able to live, and it is still warm when there are many people.

And now, they have been assigned dormitories, beds have been arranged for each person, bedding and uniform have been distributed, and there are complete sets of living utensils, what more could they ask for as slaves?

It is roughly calculated according to the internal volume of the hollow city wall of 5 meters on the first floor, 1000 meters high, 1000 meters wide and 800 kilometers long.

If all of them are built into 5×5 meters, 25 square meters of collective dormitory single rooms, each dormitory is arranged with 5 high and low shelf beds, and 10 subordinates are accommodated.

Just a ring of walls around the periphery is enough to build 6.4 billion dormitories, even if you remove the floor height, wall thickness, bathrooms, corridors, balconies and other public spaces, 5 billion dormitories are counted, which is enough to accommodate 50 billion people.

In addition, the 30,000 million-level tower city in the city can accommodate 30 billion people, and the dungeon is squeezed again.

It is not a problem for the entire Wuji Emperor to have a population of 100 billion, far exceeding the needs of Bai Yuqi's original super city designed with a population of 30 billion.

Of course, this is just theoretical design data, in fact, the 30 billion people of the Western Cloud Empire can't all shrink in one city, and there is no need to shrink all in one city, or what to eat and drink?

The vast majority of the population spends most of their time in resource factories and mines outside the Infinite Imperial Capital, creating and transporting resources for the city.

Therefore, the population pressure of the future city is far less than imagined, and it can even be said that the density will be very small, and there is no need to build such a huge city.

But Bai Yuqi didn't care, so he let the disciples of the Wuji System under his command take the billions of people of the Great Wilderness Native Countries who had just been absorbed into the Xiyun Empire to build according to this large-scale goal.

It's not that Bai Yuqi created the Western Cloud Empire in order to flaunt himself, and he built some wonderful buildings as a commemoration.

Rather, it is to better run in and train these populations, weaken and alleviate their rebellious psychology of being annexed by the Bai clan after the death of the country.

Under the perfect management mechanism of the Wuji system, these populations are first separated from their original identity and environment.

Then use the huge project, so that they are busy and have no time to think nonsense.

Then use the perfect reward mechanism of the spiritual network to give them a sense of anticipation for their future life.

Finally, with the help of joining forces, they created a sense of accomplishment in the wonder building, so that they had a sense of collective honor and honor, as well as a sense of identity and centripetal force for the Western Cloud Empire.

Under the guidance of layers of guidance, these populations from the indigenous countries of the Great Wilderness were perfectly transformed into the newly born people of the Western Cloud Empire.

The transformation can be completed so smoothly is purely because the vast majority of these people are from the indigenous countries of the Great Wilderness, and their sense of identity with the original ethnic groups is extremely limited.

The second reason is that from the very beginning, Bai Yuqi separated them from the original opposing class of Shirong groups.

They lose their sense of psychological oppression, so that they can release their originally suppressed emotions and guide and transform their emotions homeopathically.

And the original Shirong class also has the same principle of psychological guidance.

Originally, they were the elite class of various countries, but after the defeat of the war, they had to join the command of the Western Cloud Empire.

However, they have been deprived of their original territory and status, and it is impossible to say that there are no negative emotions such as resentment and resentment.

However, Bai Yuqi kept their private possessions except land and slaves, which left them with a faint hope of a comeback.

Then the countries added up to tens of thousands of battle prisons, hundreds of thousands of war guns, millions of war battles, and tens of millions of war horses, gathered them, scattered and reorganized, and reorganized them with the forces of the original Bai Clan, and then separated them and threw them on the border of the unexplored wasteland around the terracotta plain.

While using the Tang military system to train them, they were taught the new "Infinite Forging Method".

After bringing them under the management system with the help of the "Heavenly Dao System", they lost the ability to break free from the system.

and then use the inhumane style of the Wuji system to take out those dark crystal energy weapons and various equipment of the Aokai Black Branch for military exercises to form a force deterrent.

Make them realize their weakness and insignificance under the rule of the Xiyun Empire, and finally let them spend their energy on those wild tribes of the Great Wilderness around Xiyun Basket, so that they can have a sense of accomplishment in the pursuit of honor in battle.

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